Storozh, O.G. “The Resolvents of Proper Extensions of Linear Relations and Finited Mensional Restrictions of Densely Defined Operators”. Reports of the National Academy of Sciences of Ukraine, no. 4 (May 12, 2024): 3–8. Accessed May 9, 2026. https://nasu-periodicals.org.ua/index.php/dp/article/view/2747.